I took the 107 test after using the FAA study guide and one of the free test question sites.
there are easy questions like who is responsible for ( always the PIC), and more complicated questions like dealing with elevations and such ( Federal Airways have a 1200 foot AGL floor, etc)
If you know a pilot, they can teach you how to read a sectional chart and differentiate air spaces, etc.
If you can not read a sectional chart you are doomed.
I have been chasing my Part 61 license for 12 years... I'll never get it it but I enjoy flying every few months with a CFI, usually in a PA-28-161, so I already had a working knowledge of how to get the info off a chart.... if you want to experience a fun time, try reading a sectional chart in a cockpit at 2500 AGL ....
The rules, regulations, crew management BS, and weather questions can be learned from the FAA study guide.
The questions dealing with entering the pattern, pattern altitude, downwind, base, final approach... where a plane is in the pattern.... those are a tad more difficult.
just remember, when you take the test, and they reference a diagram that is a sectional, they will also reference a point on the map ( point 1, 2, 3, etc) and there may be many reference points... get the right point and the information you are looking for should be close to that point.... within a few inches.
and remember, when in doubt the answer is the Pilot In Charge